// Copyright 2020 Red Hat, Inc. and/or its affiliates
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//      http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

package config

// ImageCacheMode defines whether image cache should be used for runtime image or images should be rather built manually.
type ImageCacheMode string

var (
	// UseImageCacheAlways Always use image cache
	UseImageCacheAlways = ImageCacheMode("always")
	// UseImageCacheNever don't use image cache, build always manually
	UseImageCacheNever = ImageCacheMode("never")
	// UseImageCacheIfAvailable use image cache if image is available there, otherwise build locally
	UseImageCacheIfAvailable = ImageCacheMode("if-available")
)

// IsValid returns true if image cache mode value is one of valid expected modes
func (imageCacheMode ImageCacheMode) IsValid() bool {
	switch imageCacheMode {
	case UseImageCacheAlways, UseImageCacheNever, UseImageCacheIfAvailable:
		return true
	}
	return false
}
